According to Official Guinness Records,
The longest duration holding a 20 kg (44.09 lb) weight with outstretched arms is 2 min 39 secs, achieved by Anatoly Ezhov (Belarus) in Arkhangelsk, Russia, on 21 May 2017.Anatoly used a 20 kg (44.09 lb) kettlebell for his record attempt.
For a complete list of 2017 records, please visit 2017 Guinness Records in Russia.